Features: brand new and high quality Made of aluminum alloy, anti-corrosion and durable. The door is closed and buffered to avoid damage to the door due to collision. Built-in high-strength spring, strong pulling force, good durability. Door opening positioning: the body has a built-in positioning buckle. When the door is opened to 110 degrees, the connecting arm reaches the positioning buckle position to realize the positioning function. Speed control port: Adjust the Phillips screw to control the closing speed, clockwise to increase the buffer, counterclockwise to increase the closing speed. Specifications: Material: Aluminum Alloy Bearing Weight: 30kg Suitable for Door Width: 500-900mm/19.69-35.43inch Suitable for Door Weight: 15-30kg Size: As Shown Type: A Large/A Small/B Small Package Includes: 1x Door Closer（with Screws） note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.